Sliding frame press
a frame press and sliding frame technology, applied in the field of sliding frame presses, can solve the problems of difficult operation, relatively complex press design, and inability to simultaneously apply uniform pressure to both the upper and lower surfaces of the workpi
Inactive Publication Date: 2001-01-02
YAMAMOTO TSUTOMU +1
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- Abstract
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Problems solved by technology
This design has an inherent shortcoming in that it cannot simultaneously apply uniform pressure to both the upper and lower surfaces of the workpiece.
As these actuators require a feedback type of control system, the resulting press design is relatively complex and operation is difficult.
This process, however, makes it relatively difficult to equalize the pressure applied by the upper and lower punches as such pressure is largely dependent on the amount of pressure applied in the pre-forming process.
Moreover, the die must be partially rotated and the upper punch lowered in order to press the workpiece out of the die--a relatively complex and time consuming operation.
Method used
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embodiments
The following discussion explains the invention embodied as a powder media molding material molding press as illustrated in FIGS. 2 through 4. FIGS. 2 through 4 provide a sequential illustration of the operation of the invention embodied as a powdered pharmaceutical or powdered ceramic molding press.
As shown in FIG. 2, forming die 13, supported by lower punch 19 inserted therein from below, is placed on die support spacer 14. Forming die 13 is then filled with the powdered molding material after which upper punch 18 is placed at the opposite end of the die 13. This completes the forming preparation operation.
Hydraulic oil is then supplied to power cylinder 16 from hydraulic power source 10, which can be a manual or electric hydraulic pump, thus moving pressure rod 17 in a downward direction into contact with upper punch 18, and sequentially raising the sliding frame member 2 whereby pressing upper punch 18 into the forming die to initiate the compression molding process.
Pressure aga...
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Abstract
A sliding frame press utilizing a single pressure generating actuator to simultaneously apply the same uniform load to opposite sides of a workpiece. Two posts integral to sliding frame part 2 are freely and movably supported at the upper surface and within a post guide part located at both sides of frame base 5. Pressure is exerted on pressure rod 7 by the force applied at actuator 6. When the pressure applied to pressure rod 7 by actuator 6 exceeds the free weight of sliding frame part 2, a reactive force generated from pressure rod 7 operates to raise sliding frame part 2, thus simultaneously applying a uniform load to opposing sides of the workpiece located between pressure rod 7 and the lower punch 9 operatively connected to the sliding frame part 2.
Description
The invention relates to presses of the type generally employed for compressing, volume reducing, crimping, pressure inserting, and other pressure-based processes by exerting pressure to at least two opposite sides of the material being worked on. The invention is characterized by a sliding frame part that is movably displaceable within a fixed frame base and an oppositely disposed pressure generator, by means of the force supplied by a single pressure generating (force exerting) actuator.PRIOR ARTPresses used in general industrial applications are often the single action type which employ a single pressure generating actuator as a means of applying pressure in one direction. This design has an inherent shortcoming in that it cannot simultaneously apply uniform pressure to both the upper and lower surfaces of the workpiece. Dualaction presses have been developed as a means of eliminating this shortcoming through a mechanism that is able to apply pressure simultaneously to opposing s...
Claims
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Login to View More IPC IPC(8): B30B7/04B30B7/00B30B11/02B30B15/04B30B1/00
CPCB30B7/04B30B11/02B30B15/04B30B1/00
InventorANZAWA, KOHKI
OwnerYAMAMOTO TSUTOMU